How to use the npm-which.mockFn function in npm-which
To help you get started, we’ve selected a few npm-which examples, based on popular ways it is used in public projects.
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okonet / lint-staged / test / findBin.spec.js View on Github 
it('should throw a helpful error if the cmd is present in pkg scripts', () => {
const originalConsole = global.console
global.console = makeConsoleMock()
npmWhichMock.mockFn.mockImplementationOnce(() => {
throw new Error()
})
expect(() => {
findBin('lint')
}).toThrow('Could not resolve binary for `lint`')
expect(console.printHistory()).toMatchSnapshot()
global.console = originalConsole
})it('should resolve path to bin from cache for subsequent invocations', () => {
npmWhichMock.mockFn.mockClear()
findBin('my-cmd')
expect(npmWhichMock.mockFn).toHaveBeenCalledTimes(1)
findBin('my-cmd --arg')
expect(npmWhichMock.mockFn).toHaveBeenCalledTimes(1)
})npm-which
Locate a program or locally installed node module's executable
